Padlock



E. N. JACOBI Feb. 26, 1929.

PADLOCK Filed De. '7, 1927 Edward AJdmbf# @gab y lll Patented F eb. 26, 1929.

VUNITED :STATES EDWARD N. JACOBI,

Partieny OFFICE,

F MILWAUKEE, WISCONSIN, ASSIGNOR TO BRIGGS & STRATTON CORPORATION,l OF MILWAUKEE, WISCONSIN, A CORPORATION OF DELAWARE.

PADLOCK.

Application filed December 7, 1927. serial No. 238,385.

This invention relates to certain new and useful improvements 1n padlocks and hasas an object the provision of a padlock which 1s of simplified construction and which will af within the shell or casing without the opera-l tion of the key means so as to facilitate the securement of the padlock in place.

Another object of this invention resides inl the provision of an improved padlock having roller members or tumblers cooperating with the padlock shackle shanks to lock the samey within the shell or casing.

A further object of this invention resides in the provision of an improved padlock employing rotating or rocking roller members or tumblers adapted to be rotated to unlocked position by key means and to be free to rotate from locking position to permit the engagement of the shackle within the casing b yA still further object of thisinvention resides in the provision of an improved lock of the character described wherein the opening of the padlock by force, in the form of blows from a hammer or other tool, is prevented.

Vith the above and other objects in view which will appear as the description proceeds, my invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

In the accompanying drawing, I `have illustrated one complete example of the physical embodiment of my inventionconstructed according to the best mode I have so far devised for the practical applicationy of the principles thereof, and inwhich:

Figure 1 is a view., partly in section, and partly in elevation, taken through a padlock employing my invention on the plane of the line 1-1 of Figure 2; f

Figure 2 is a view taken transversely through the lock on the plane of the line 2-2 of Figure l;

Figure 8 is a view similar to Figure 2 the movement of its shanks into the shell. y

defined by the appended.k P

`taken on a lower plane, as indicated by the' line S-Bof Figure 1;

Figure 4 is a View, partly in section and partly in elevation, taken through the lock on the plane of the line 4-4 of Figure 3, and illustrating the roller members or tumblers as in their position permitting the withdrawal of the shackle; and

Figure 5 is a perspective View of one of the roller members or tumblers and thek parts for actuating the same said lmember' and parts being detached of the padlock proper.

Referring now more particularly tothe accompanymg drawlng, 1n which like numerals designate like parts throughout the several views, designates a shell or casing preferably of hardened metal and of substantial oval lshape in transverse section and having one end closed, as at 11, and its other end open to receive therein a retainer member or block 12. The retainer isr cast, or otherwise formed, and is of a shape in transverse section to have Ya snug fit within the shell in which it is secured-by flanging the shell marginal edges thereover, as at 13, the flanges 13 fitting within a recess or groove 14 in the outer surface 15 of the retainer.

The retainer or block 12 is formed with a pair of spaced, longitudinal bores 16 registering with apertures 17 in the closed end of the shell and extending .to a point adjacent the outer surface of the clock, the bores being preferably equi-spaced from the center of the block, as best illustrated in Figures 2 and 3, and receiving the Shanks 1S of a U-sha'ped of the shackle shanks are provided with oppositely disposed locking recesses or notches 2O of approximately V-shape, as best illustrated in Figures 1 and 4, the lowermost wall 21 of each recess being struck on an arcvhavy ing ,the axis of the adjacent one of two transverse bores 22, formed in the upper end of the casting, as a center when the notch is in alignment therewith. The uppermost wall of each notch or recess is straight and inclines upwardly and outwardly, as at 23. The adjacent bores 16 andV 22 overlap to a point so that, with the notches 2O in register with thebores 22, thereof form continuations of the `bores 22 through the bores 16.

The retainer 12 is centrally provided throughout its length with a plurality of conadlock shackle 19. The innermost surfacesk the curved portions 21k centric bores 24, 25, 26 and 27, which are parallel with the axes of the bores 16. A key actuated cylinder 28 is rotatable within the bore 26 with its outer reduced end 29 journaled within the bore 27, the cooperating shoulders of the cylinder and bores 26 and 27, preventing outward movement of the cylinder which carries suitable key actuated tumblers 30 of conventional construction and engageable Within slots 31 in the wall o1c bore 26 when aligned therewith and the key 32 is withdrawn.

The inner end of the cylinder has a rectangular opening 33 therein to receive the lower end of a square shaft 34 having its upper end extended through a tumbler actuating member 35, to the later described, and a washer 36 rotatable within the bore 24, member 35 and washer 36 turning with the shaft 34 which is rotated by the cylinder 23. The shaft 34 passes between locking elements or tumblers 37 journaled in the bores 22 and its medial portion 33 disposed therebetween is turned down to reduce the necessary distance between the tumblers and facilitate the compacting of the padlock.

The actuating member 35 is preferably struck from a single piece of metal and has two pairs of arms 39 and 40, the arms 39 extending laterally in opposite directions and have enlarged ends 41 with their peripheries struck on an arc employing the axes ot' the concentric bores as a center and of a radius equal to that of the bore 24 so that the ends 41 provide guides having a bearing on the shoulder formed at the juncture ot' the bores 25 and 24. The arms 40 have their outer end portions 42 struck downwardly to form actuating lugs which engage in recesses 43 formed in the locking elements or tumblers 37 to one side of their axes, as best illustrated in Figure 4, so that rotation of the actuating member 35 in a direction to impinge the lugs 42 against the vertical sides 44 of the tumblers 37 rotates the tumblers against their spring means, to be described. Each element 37 likewise has a transverse recess or groove 45 to register with the adjacent bore 16 when in unlocked position, said recess being preferably parallel with the vertical side 44 of recess 43 so that when the elements 37 are in their positions illustrated in Figure 4, and the shackle bolt free to be removed from the padlock, the lugs 42 have a. maximum leverage to overcome'the tension of the springs 46, now to be described, which are at their point of maximum contraction.

The retainer 12 is provided with two longitudinal bores 47 disposed along side of their bores 16 and parallel therewith to receive the expansile spring 46, above referred to, and spring pressed plungers 4 3 are normally urged upwardly by the springs to yieldably engage the portions oi the wall of arcuate recesses 50 formed in the members 37 which are disposed over the bores 16 so that the plungers 48 normally tend to rotate the elements 37 inwardly to position the solid portions thereof in the notches or recesses 20 of the shackle. This movement of the locking elements by the spring pressed plungers is restricted by a pin 51, see Figure 3, inserted in bore 26 with its inner end engaged in a limiting slot 52 in the upper end of the cylinder 28 to limit its rotation in either direction and consequently the rotation ot' the lugs 42, as will be readily apparent.

lVith the parts in the positions illustrated in Figure 1, the shackle 19 is locked within the retainer by the solid portions ot the members 37, being engaged with the curved wall of the notches 2O throughout their length so that attempts to retract the shackle are resisted. To remove the shackle, key 32 must be inserted in the look cylinder to retract the tumblers 30 within its circumit'erence, when the cylinder is rotated by the key to its position illustrated in Figure 4. Rotation of the lock cylinder in a clock-wise direction with respect to Figures 1 and 2, similarly rotates member 35 causing its lugs 42 to bear against the curved edge portions 53 of the walls 44 of recesses 43 to rotate the members 37. The plungers 43 move into their bores against the springs 46 until the recesses 45 of the members 37 parallel the bores 16, when the shackle is free to be withdrawn, in the manner illustrated in Figure 4.

lVhen it is desired with the retainer, it is inserted in the bores 16, its ends engaging the walls ot the recesses 45 which extend into the bores 16, as illustrated in Figure 4, rotating the members 37 against their plungers 48. The members 37 turn back into the notches 20 as they align with the transversebores 22 locking the shackle.

The casing 10 being of substantially oval shape makes it ordinarily dilicult to properly lit the member 12 therein in that itcannot be machined on a shaper, and further when machined by being passed through a die, its length is such that theV material removed curls inwardly jamming the die. rllhe device illustrated overcomes this objection by rec-essing the outer surface of the member 12 when the same is initially cast or formed so that projections or knobs 54 are formed to reduce the material removed in the iinishine; of the member. VVit-h this construction the excess material is removed in the form of very small chips which are readily cleared from the die.

From the foregoing description taken in connection with the accompanying drawings, it will be readily apparent to those skilled 'in the art to which an invention of the character described appertains, that an unusually strong padlock structure is provided in that the shackle is held by a mass of material rather than a small locking surface, as is customary, so that attempts to release the to engage the shackle retainer bo-re to permit the insertion therein and removal therefrom of the shackle member', said shackle member having a recess adapted to register with the element, the shackle member, recess being cur'ved 'on an arc having the axis of the element as a center', yieldable means normally rotating the elements to dispose its body portion Within the retainer bore and the shackle member' recess to secure the shackle member in the retainer,

. said element being rotatable against itsyieldable means as the shackle member is inserted in the retainer bore and moving un-der its yieldable means to engage in the shackle member recess as it registers therewith.

2. In a device of the character described, a retainer having a bore therein, a shackle member slidable in the retainer bore, a member rotatable in the retainer with its outermost periphery passing transversely through the retainer bor'e and having ak transverse groove in its periphery adapted to be registered with the retainer bore to permit the insertion therein and removal therefrom of the shackle member', said shacklemember having a recess adapted to register with the rotatable member, thel lowermost wall of the shackle member recess being curved on an arc having the axis of the rotatable member as a center, spring means normally turning the rotatable member to dispose its body portion within the retainer bore and the shackle member' recess to secure the shackle member in the retainer, the rotatablemember being free to turn against its spring means as the shackle member is inserted in the retainer bore and moving under its spring means to engage in the shackle member recess as it registers therewith, the periphery of the rotatable member conforming with the contour of the shackle member recess and preventing the retraction of the shackle member from the retainer, and key actuated means for rotating the rotatable member against its spring means to free the shackle member for retraction from the retainer.

3. In a device of the character described, a member to be locked, a. locking member having a bore adapted to receive the first member and a second bore transversely of the first and communicating therewith, a rotatable member within the second bore and having a transverse groove therein adapted to be registered with the first bore to permit movement of the member to be locked into and out yof the first bore, said member to be locked having a notch therein provided with a cur'ved lwall conforming with the circumference of the rotatable member, means for actuating the rotatable member when the member' to be locked is in the locking member' first bor'e with its recess in register with the secondv bore to engage the locking member` in said recess and prevent'retraction of the member to be locked. i

4. In a device of the character described, a member to be locked, a locking member having a bore adapted to receive the first member and a second bor'e transversely of the first and communicating therewith, a rotatable member within the second bore and having a transverse groove therein adapted to be registered with the first bore to permit movement of the member to be locked into 'and out of the first bore, said member' to be locked having a notch therein provided with a cur'ved wall conforming with the circumference of the rotatable member, and spring means normally rotating the rotatable member to engage its body portion inthe recess of the member to be locked when the same Vis in register with the second bore to preventl the retraction of the member' to be locked, and key actuated means for rotating the rotatable member against its spring means to register' the transverse groove therein with the first bor'e and permit the removal of the rgrember to be locked fr'om the locking memer'. v

5. In a lock construction, a retainer having a bore, a shackle insertable in the bore to be releasably held therein, a locking element disposed in the retainer transversely of its bor'e and adapted to have its peripheral portion normally extended into the bore, said shackle having a recess in its side wall into which the body portion of the locking element is engageable to prevent the retraction of the shackle, a key controlled locking cylinder' mounted in the retainer with its axis disposed at an angle with respect to the axis of the locking element, and means connecting the cylinder' with the locking element whereby rotation of the cylinder rotates the locking element to yregister a transverse groove in its periphery with the retainer bore to free the shackle for removal therefrom.

6. In a lock construction, a retainer having a bore, a shackle insertable in the bore to be releasably held therein, a lockingy element disposed in the retainer transversely of its bore and adapted to have its peripheral portion normally extended into the bor'e, said shackle having a recess in its side wall into which the body portion of the locking element is engageable to prevent the retraction of the shackle, a key controlled locking cylinder carried` by the retainer' with its axis parallel to that of. the bore, an actuating member rotatable with the cylinder, a lng carried by the actuating member, and a connection between said lug and the locking element whereby rotation o' the cylinder rotates the element to disengage the same from the shackle recess and permit its Withdrawal from the retainer.

7. In a padlock construction, a retainer having a pair ot sidewise spaced parallel bores therein and a pair of bores transversely o'l. and communicating with the longitudinal bores, locking elements rotatable in the transverse bores and having transverse grooves therein registerable With the longitudinal bores of the retainer, means normally rotating the locking elements to disalign their transverse grooves with the retainer longitudinal bores whereby their peripheral body portions are normally disposed Within the retainer bores, key controlled means for rotating the locking elements against their rotating means to register their transverse grooves With the retainer' longitudinal bores, and a shackle member having shanks provided with recesses adapted to be inserted in the longitudinal bores of the retainer and there held by engagement of the peripheral body portions of the locking elements in the shan-k recesses,

8. In a lock construction, a retainer having a pair of sideWise spaced parallel bores therein, a pair of transverse bores transversely of and communicating with the'longitndinal bores, locking elements rotatable in the transverse bores and having transverse grooves therein registerab-le with the longitudinal bores of the retainer, yieldable means normally rotating the locking elements to disalign their transverse grooves With the retainer longitudinal bores whereby their peripheral body portions are normally disposed Within the retainer bores, key controlled means for rotating the locking elements against their yi-eldable means to register their transverse grooves With the retainer longitudinal bores, and a shacklemember having Shanks provided with recesses adapted to be inserted in the longitudinal bores of the retainer and there held by en gagement of the peripheral body portions of the looking elements in the shank recesses,

the transverse grooves of the locking ele ments being disposed upwardly When the peripheral body portions of the'elements are extended into the retainer longitudinal bores whereby insertion of the shackle member Shanks in said bores rotates the elements against their yieldable means to permit the movement ot' the shackle Shanks into the retainer.

In testimony whereof I hereunto aliiX my signature.

EDWARD N. JACOBI. 

